Ultrafine Silver Powder Used for Conductive Silver Pastes
Advantages: flexibility, conductivity, good printability, different rheological performance
The composition of the Silver conductive slurry requires different types of silver powders (such as the commonly used silver powders, of which particle size between 0.1 microns and 10 microns) or combined as conductive filler, and even different formulations in each category require different silver powders as conductive function materials.
Object: To achieve maximum utilization of silver conductivity and thermal conductivity with the least amount of silver powders in the established formulation or film forming process, to optimize the performance and cost of film properties.
General classification of Ultrafine Silver Powders in Electronic industry:
1. High – temperature sintered silver conductive paste with high sintering active silver powders
2. High – temperature sintered silver conductive paste with high dispersion silver powders
3. High conductivity reduction silver powders
4. Bright silver powders
5. Flake silver powders
6. Coarse silver powders
Application of Conductive Silver Pastes
1.The application in the electronics industry
For a variety of touch screen, film shape, electronic toys, computer keyboard, remote control and other electronic products, to play a part in conductive, thermal, shielding and so on.
2.Application in Solar Energy Industry
Solar conductive paste is one of the most important materials of solar energy, solar cells in addition to the most important material other than silicon, and solar energy conversion efficiency is closely related. (The solar cell back electrode and the front electrode are used silver paste)
Solar cell requirements for the slurry:
Forming a good ohmic contact, low contact resistance
Good wire conductivity
Strong adhesion strength
High aspect ratio
Wide sintering process window
Good chemical stability
There are suitable for large-scale production process
Low price
Solderability, solderability
Because of good performance of ultrafine silver powders used in conductive silver pastes, it’s a good choice in solar energy conductive pastes.
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